Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef20d713bcd62317…

MALICIOUS

PDF

69.6 KB Created: 2021-02-14 19:08:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c3067c9d0f693f8c2534cd4e3ed4e845 SHA-1: f672d2184eb1bef5e38bd7390d6a7ce5e0cb5a53 SHA-256: ef20d713bcd62317d30c5a2e2157444983fd74bfd2e1c3f8e48bf5b40358d809
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/123?utm_term=solvay+middle+school+calendar PDF link annotation
    • https://cdn.sqhk.co/niporatibu/iajh3Qm/34123595747.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/loKniaP/3244291201.pdfIn PDF document text
    • http://koguvagad.22web.org/certificate_design_vector_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nevupediwix/BCjzggm/kelemuluzizuwexotodol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387920/normal_5fda2fb878b79.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/aahhTTA/nojukusapapevid.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwikiw/hjjhejh/kazuzolajitozewowamo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419235/normal_601b3c2021afd.pdfIn PDF document text
    • https://cdn.sqhk.co/rizavoxaje/jgjcfij/visakha_defence_academy_in_vizag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/genijusemu/nirupebe.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/lactulose_in_hepatic_encephalopathy.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/real_estate_appraisal_exam_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/age_of_empires_3_demo_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/catering_business_plan_format.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/openssl_certificate_pem_format.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD392 5444 bytes
SHA-256: 1ec0e11d618aca7894c2433ea94d3a064d0a0a241137f8521bbbe6943fc7dec6
font_01_sfnt_off0000e5f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F8 10432 bytes
SHA-256: 5902c3555cb964bee159dc74282b738ee2d0aefd73a4c413c1026aef32dc9580